The Influence of Mo on Corrosion Resistance of Fe-Cr Sintered Stainless Steels
The Influence of Mo on Corrosion Resistance of Fe-Cr Sintered Stainless Steels
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Mo对Fe-Cr烧结不锈钢耐蚀性的影响
DOI：
10.2497/jjspm.24.60
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
Tatsuo Hisada
中科院分区：
文献类型：
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作者：
Tetsuo Katô;T. Kôno;Tatsuo Hisada
针对水雾化法制备的18%Cr、18%Cr-1、2%Mo、23%Cr和23%Cr-1%Mo不锈钢粉末，研究了Mo添加量对烧结钢耐蚀性能的影响。结果总结如下。(1)在硝酸中，添加Mo对18%Cr和23%Cr烧结钢无影响。(2) Mo对硫酸和盐酸腐蚀的影响显著。当烧结密度为6.5 g/cm3时，含Mo烧结钢在5%硫酸中的腐蚀速率与不含Mo的钢的腐蚀速率呈1/ 4mo1.2 +1的关系减小。(3)如果将18%Cr和18%Cr-2%Mo烧结钢的硫酸腐蚀速率和盐酸腐蚀速率与退火铸钢进行比较，则18%Cr-2%Mo的腐蚀速率的对数可以表示为烧结密度的线性方程。而在铬含量为18%的情况下，烧结钢的完全致密率大于退火铸钢。(4)在这些腐蚀中，观察到粉末颗粒从18%Cr烧结钢表面滴下。但在18%Cr-2%Mo烧结钢中没有出现这种现象。
As to 18%Cr, 18%Cr-1, 2%Mo, 23%Cr and 23%Cr-1%Mo stainless steel powders produced by the water-atomization, an investigation was made about the influence of Mo addition on the corrosion resistance of the sintered steels.Results are summarized as follows.(1) In the nitric acid, no influence of Mo addition is observed in 18%Cr and 23%Cr sintered steel.(2) The influence of Mo on the sulfuric and hydrochloric acid corrosion is remarkable. When the sintered density is 6.5 g/cm3, the corrosion rate in 5% sulfuric acid of the sintered steels containing Mo decreases with the relation of 1/4Mo1.2+1 to that of the steels containing no Mo.(3) If the sulfuric and hydrochloric corrosion rate of 18%Cr and 18%Cr-2%Mo sintered steels is compared with the annealed cast steel, logarithm of the corrosion rate of 18%Cr-2%Mo can be expressed as a linear equation of the sintered density, while in the case of 18%Cr the rate of fully dense sintered steel is bigger than that of annealed cast steel.(4) In these corrosion, the dropping of powder particle from the surface of 18%Cr sintered steel is observed. But, this phenomenon is not observed in the 18%Cr-2%Mo sintered steel.